Status: IN
Recursive structures achieve both flexible traversal and dynamic request routing: Iterator's dual design axes (control: external vs. internal; robustness: polymorphic vs. cursor) provide traversal flexibility across the Composite-Iterator-Visitor triad, while Chain of Responsibility's natural integration via Composite's parent references adds emergent routing capability, yielding a recursive substrate that supports both data-flow (traversal with operations) and control-flow (request routing) patterns.
Iterator's traversal flexibility + Chain's routing capability provides dual data-flow and control-flow infrastructure on recursive structures
Depends on (SL): recursive-triad-traversal-flexibility, recursive-substrate-with-chain-routing